<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="./vue.js"></script>
</head>

<body>
    <div id="app">
        <my-header></my-header>
    </div>

    <script>
        Vue.component("myHeader", {
            template: `
                <div>
                    <h1>{{title}}</h1>
                </div>
                `,
            data() {
                return {
                    title: "爱凤x"
                }
            }
        })
        new Vue({
            el:"#app"
        })
    </script>
</body>

</html>